Convertible sofa



FIG. 1 is a front perspective view of a convertible sofa showing my design in position for use as a sofa;

FIG. 2 is an end view;

FIG. 3 is a rear perspective view; and

FIG. 4 is a perspective view with the bolsters removed and the sofa shown in its converted position for use as a bed.

The end of the convertible sofa not shown is a mirror image of the end shown in FIG. 2. 

The ornamental design for a convertible sofa, as shown and described. 